SARS-CoV-2, Influenza A/B and RSV antigens are qualitatively detected through nasal swab samples using the colloidal gold method. After adding the sample, the SARS-CoV-2 antigen (or influenza A/B and RSV) in the sample to be examined is compared with the SARS-CoV-2 antigen (or influenza A/B & RSV) marked with colloidal gold Binding pad combines to form the SARS-CoV-2 antigen (or influenza A/B and RSV) colloidal gold complex. Through chromatography, the SARS-CoV-2 antigen (or influenza A/B and RSV) antibody colloidal gold complex diffuses along the nitrocellulose membrane.
Within the detection line area, the SARS-CoV-2 antigen complex (or influenza A/B and RSV) binds to the antibody trapped in the detection line area and shows a purple-red line. SARS-CoV-2 antigens (or influenza A/B and RSV) labeled with colloidal gold diffuse into the control line area (C), are captured by sheep anti-mouse IgG and form red lines. When the reaction is complete, you can evaluate the results by visual observation.